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Read the Post in new Window Read the Post in Threaded view  Post #48: Nature's Bias by Brian Clark on 2008-06-05 
Browse the content of the threads in new Window  Thread: The last phonocorrector: “End of Life" Phonostage in Analog Playback  310 Replies 
[quote user="deemon"]Do you mean a battery bias , Brian ? We didn't try it because of 1 V bias voltage - I don't know if the battery with this voltage does exist . I know only 1,5 V and 1,2 V cells ...... maybe using some chemical reactions we can ob...

Read the Post in new Window Read the Post in Threaded view  Post #47: One-Story Jack by Brian Clark on 2008-06-05 
Browse the content of the threads in new Window  Thread: The last phonocorrector: “End of Life" Phonostage in Analog Playback  310 Replies 
In the absent of any counter hypothesis I stick to mine. By introducing a relatively high level of harmonic distortion at the beginning of the amplification chain with "natural" decay structure the result that reaches our ear/brains is most pleasing,...

Read the Post in new Window Read the Post in Threaded view  Post #55: Earthy matters by Brian Clark on 2008-06-05 
Browse the content of the threads in new Window  Thread: Tell me about more about Ortofone SPU Sound. in Analog Playback  54 Replies 
Excellent! I don't use step-ups and I always tie signal earth to chassis earth through a 10 ohm resistor at input.Brian....

Read the Post in new Window Read the Post in Threaded view  Post #42: Question for Dima re 2nd stage biasing. by Brian Clark on 2008-06-04 
Browse the content of the threads in new Window  Thread: The last phonocorrector: “End of Life" Phonostage in Analog Playback  310 Replies 
Dima, did you & Romy experiment with contact-potential biasing of the second stage before settling on fixed-biasing? My Spice files are on my old computer and effectively lost else I would run simulations out of curiosity.Brian....

Read the Post in new Window Read the Post in Threaded view  Post #41: USSR SSG by Brian Clark on 2008-06-04 
Browse the content of the threads in new Window  Thread: The last phonocorrector: “End of Life" Phonostage in Analog Playback  310 Replies 
[quote user="deemon"]Brian , I never tried SSG cap in phonostage . SSG has a good reputation ..... but I'd prefer teflon for coupling . Mica caps , even good ones like SSG , seems too "bright" for me , but teflon sound pretty neut...

Read the Post in new Window Read the Post in Threaded view  Post #40: USSR SSG by Brian Clark on 2008-06-04 
Browse the content of the threads in new Window  Thread: The last phonocorrector: “End of Life" Phonostage in Analog Playback  310 Replies 
[quote user="deemon"]Brian , I never tried SSG cap in phonostage . SSG has a good reputation ..... but I'd prefer teflon for coupling . Mica caps , even good ones like SSG , seems too "bright" for me , but teflon sound pretty neut...

Read the Post in new Window Read the Post in Threaded view  Post #39: Of mosfets, caps and distortion. by Brian Clark on 2008-06-04 
Browse the content of the threads in new Window  Thread: The last phonocorrector: “End of Life" Phonostage in Analog Playback  310 Replies 
[quote user="Romy the Cat"]Brian, and how do you find your MOSFET behaves compare the 12AX7-based cathode follower?[/quote]Romy, I have yet to try. Only got them on recommendation very recently. They're cheap enough to try in a B9A plug-in without al...

Read the Post in new Window Read the Post in Threaded view  Post #36: If I may be a litt;e suggestive..... by Brian Clark on 2008-06-03 
Browse the content of the threads in new Window  Thread: The last phonocorrector: “End of Life" Phonostage in Analog Playback  310 Replies 
I have some ZVN0545A mosfets here for exactly that purpose of replacing cathode followers. You may like to try this starting at 2mA (250V supply, 125k biasing resistor). Did you or Dima try Soviet SSG silver-mica for the first coupler? I am using 0.1...

Read the Post in new Window Read the Post in Threaded view  Post #52: Shorting the answer by Brian Clark on 2008-06-03 
Browse the content of the threads in new Window  Thread: Tell me about more about Ortofone SPU Sound. in Analog Playback  54 Replies 
My stereo corrector (834P with air-vane caps) has a shorting switch across the two channels at the input. I suggest you incorporate the same.With it out of circuit I did indeed get that hum you refer to with the SPU Mono. Switching to short eliminate...

Read the Post in new Window Read the Post in Threaded view  Post #50: SPU Mono, fact & conjecture by Brian Clark on 2008-06-03 
Browse the content of the threads in new Window  Thread: Tell me about more about Ortofone SPU Sound. in Analog Playback  54 Replies 
Per Winfeld confirmed to me that the coil former assembly is rotated 45% compared to the regular SPU such that only lateral motion is sensed. Unfortunately I did not think to ask him how the coil/coils was/were wound. Since the quoted DCR is signific...

Read the Post in new Window Read the Post in Threaded view  Post #47: Monogamy by Brian Clark on 2007-01-06 
Browse the content of the threads in new Window  Thread: Tell me about more about Ortofone SPU Sound. in Analog Playback  54 Replies 
That sounds a decent price, less than my (Japan-sourced) SPU Mono.However, SPU's the gal for me and I reckon we're married for life.I listen at civilised levels too John - tho' neighbours have just left for 3 months in Kenya........Brian....

Read the Post in new Window Read the Post in Threaded view  Post #20: Good advice by Brian Clark on 2005-07-14 
Browse the content of the threads in new Window  Thread: It is possible to eliminate some forms of gross side band di... in Audio For Dummies ™  22 Replies 
You were given damn good advice Bud. So much has disappeared into the Black since WW2... Through symmetry I would guess your technique would be appropriate to microphone diaphragms too. I have taken the liberty to send a copy of your paper to...

Read the Post in new Window Read the Post in Threaded view  Post #16: Increasing intelligibility by Brian Clark on 2005-07-13 
Browse the content of the threads in new Window  Thread: It is possible to eliminate some forms of gross side band di... in Audio For Dummies ™  22 Replies 
Bud, has the military been involved? Seems highly relevant for Sigint and hydrophone applications. Brian....

Read the Post in new Window Read the Post in Threaded view  Post #9: Re: Bejeweling the jewel by Brian Clark on 2005-07-08 
Browse the content of the threads in new Window  Thread: The Church of Denon 103C in Analog Playback  8 Replies 
Cost isn't extortionate for such an interesting experiment. I don't think Denon experimented with gem-stone cantilevers, that's very much a Dyna thing, though I believe they used boron for the 103M - which Romy has. Brian....

Read the Post in new Window Read the Post in Threaded view  Post #7: Bejeweling the jewel by Brian Clark on 2005-07-08 
Browse the content of the threads in new Window  Thread: The Church of Denon 103C in Analog Playback  8 Replies 
Flushed you! We look forward to your future assesment MJ. Certainly the speed of propagation through the stylus bar will be increased. Hopefully riveted cymbals shall corruscate as shimmering sunlight on the surface of a deep, dark pool ruffl...

Read the Post in new Window Read the Post in Threaded view  Post #4: Re: The Church of Denon 103C by Brian Clark on 2005-07-07 
Browse the content of the threads in new Window  Thread: The Church of Denon 103C in Analog Playback  8 Replies 
[quote user="Ed"]Someone I know has just sent his 103R off to get a ruby cantilever fitted.[/quote] Why, wasn't stock *H*I*F*I* enough for him? Brian...

Read the Post in new Window Read the Post in Threaded view  Post #44: Conical retipping by Brian Clark on 2005-07-06 
Browse the content of the threads in new Window  Thread: Tell me about more about Ortofone SPU Sound. in Analog Playback  54 Replies 
[quote user="skushino"]Thank you Brian - you confirmed what I feared.Caveat emptor. The seller is the former Van denHul repair guy in Germany - Detlev Brod. He offered a new SPU mono, at a price too good to be true. I specified the GM25, and when I c...

Read the Post in new Window Read the Post in Threaded view  Post #11: Changing EAR834P loading by Brian Clark on 2005-07-06 
Browse the content of the threads in new Window  Thread: Which SME 3009? in Analog Playback  10 Replies 
R1 (green/brown/orange or yellow/violet/orange) needs to be paralleled with a 12k resistor to bring the loading seen by the cart to just under 100 ohms. Brian....

Read the Post in new Window Read the Post in Threaded view  Post #9: Re: Fixed or detachable...? by Brian Clark on 2005-07-05 
Browse the content of the threads in new Window  Thread: Which SME 3009? in Analog Playback  10 Replies 
[quote user="starboy"]A friend has a fixed headshell model S2 and is about to trade for a detachable;just for convenience but worries if there is any extra sonic merit in the model he alread has? Any idea Mr B____ [/quote] Obviously the fixed head...

Read the Post in new Window Read the Post in Threaded view  Post #6: Re: Carts... by Brian Clark on 2005-07-05 
Browse the content of the threads in new Window  Thread: Which SME 3009? in Analog Playback  10 Replies 
A Series 2 should be dandy Alex Brian....

Read the Post in new Window Read the Post in Threaded view  Post #42: Oh dear... by Brian Clark on 2005-07-04 
Browse the content of the threads in new Window  Thread: Tell me about more about Ortofone SPU Sound. in Analog Playback  54 Replies 
Hello Scott, since the microgroove specification states groove width as 2.6 mil and 65 um is also 2.6 mil you will see that the stylus will only ride the top of the groove and not enter it. So it's not so much danger of damaging your LPs but of simp...

Read the Post in new Window Read the Post in Threaded view  Post #4: As George V may have REALLY said on his deathbed... by Brian Clark on 2005-07-03 
Browse the content of the threads in new Window  Thread: Which SME 3009? in Analog Playback  10 Replies 
"Bugger dogma!". Romy is quite right challenging my obeisance to the Series 1. These things are so rare and when found are likely to be in a somewhat less than pristine condition. However, it is not only the arm tube that is more massive but the ...

Read the Post in new Window Read the Post in Threaded view  Post #2: Re: Which SME 3009? by Brian Clark on 2005-07-02 
Browse the content of the threads in new Window  Thread: Which SME 3009? in Analog Playback  10 Replies 
Alex, the best version would be the first (Series 1) version but these are very rare. Next best would be the pre-Improved Series 2, having metal knife-edge bearings. The Improved would be OK for light-weight, light-tracking MM carts, having been deve...

Read the Post in new Window Read the Post in Threaded view  Post #11: An ironical misadventure by Brian Clark on 2005-06-17 
Browse the content of the threads in new Window  Thread: GoodSoundClub – one year later. in Site Support Forum  16 Replies 
Oh Romy, didn't you notice my "mischievous wink"? ;o) Sorry if the humour was poorly expressed. The subject title was reference ONLY the to musical content, which was no disappointment but positively delightful. Brian....

Read the Post in new Window Read the Post in Threaded view  Post #9: The Cat's Creme de la Creme by Brian Clark on 2005-06-16 
Browse the content of the threads in new Window  Thread: GoodSoundClub – one year later. in Site Support Forum  16 Replies 
I've played mine and there are certainly enticing & entrancing performances. Apart from the untidy transitions things don't sound toooo bad on the whole.....considering ;o) BTW I've posted Thorsten's copy on. Thanks Romy Brian....

Read the Post in new Window Read the Post in Threaded view  Post #39: Re: 25Dia, moronity and ...sushi by Brian Clark on 2005-05-14 
Browse the content of the threads in new Window  Thread: Tell me about more about Ortofone SPU Sound. in Analog Playback  54 Replies 
[quote user="Romy the Cat"]This is funny that you, the British guy, buy a European made cartridge in Japan… [/quote] Yes, I'm laughing - I've saved 40% on the Euro price! ;o) Brian. ...

Read the Post in new Window Read the Post in Threaded view  Post #37: Re: Interesting: 25Dia VS SPU by Brian Clark on 2005-05-14 
Browse the content of the threads in new Window  Thread: Tell me about more about Ortofone SPU Sound. in Analog Playback  54 Replies 
[quote user="Romy the Cat"] When you used your 25Dia then can you recall a similar experience at the beginning of the cartridge live (sharpness and bass)? [/quote] I have yet to own a CG25 Romy, my very first Ortofon - SPU Mono - is on its way fro...

Read the Post in new Window Read the Post in Threaded view  Post #34: The Mother and Father of MC carts by Brian Clark on 2005-05-14 
Browse the content of the threads in new Window  Thread: Tell me about more about Ortofone SPU Sound. in Analog Playback  54 Replies 
What you have there Romy is essentially the cartridge Ortofon introduced in 1948, the first production moving coil cartridge. The motor is the same, just the "suspension" material changed from india rubber to a modern elastomer AFAIK. Also the G-sty...

Read the Post in new Window Read the Post in Threaded view  Post #32: Contacting Andreoli by Brian Clark on 2005-05-14 
Browse the content of the threads in new Window  Thread: Tell me about more about Ortofone SPU Sound. in Analog Playback  54 Replies 
I have never contacted Mr Andreoli but his fax number was passed onto me for a friend by Christian Rintelen of HiFi Scene magazine in Switzerland. Maybe the fax number is also Andreoli's 'phone number? Christian said that he is not online. 25micro...

Read the Post in new Window Read the Post in Threaded view  Post #30: Disasters can be opportunities too! by Brian Clark on 2005-05-14 
Browse the content of the threads in new Window  Thread: Tell me about more about Ortofone SPU Sound. in Analog Playback  54 Replies 
Romy, it has just struck me that you could try and find someone who could replace with a smaller diameter diamond, a 17 mil or even a 12 mil! Then you could experiment with which type best suits your favourite mono pressings. This is what professiona...
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